C4845 Open up the Underworld!

Yang Bo stared at the rattle drum in his hand. This rattle drum was like a toy, but also like a magic treasure.

He turned to look in the direction of Number Four and asked, "What do you think I should do?"

"Shake the rattle drum and make the Underworld appear?"

Number Four looked at Yang Bo, "What is the use of the Underworld?"

Yang Bo thought for a moment and said